Quote Originally Posted by rspears View Post
Since it is fiberglass I think I'll go for a bit smaller, like 2" and maybe 3.125" and then sand to fit. I'm a bit concerned with 3.125" for the big ones, as that is only 1/32" small, and they caution not to go too big. Thanks for all of the input.
If the dash comes out, I suggest a drill press. Those #@$% hole saws really like to grab and move around ( I have a scar from a 4 incher to prove that statement ). If not, start it s-l-o-o-w